{"id":238318,"date":"2025-06-18T04:28:58","date_gmt":"2025-06-18T04:28:58","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=238318"},"modified":"2025-06-18T04:29:00","modified_gmt":"2025-06-18T04:29:00","slug":"the-density-of-a-sample-of-crude-oil-is-700-kg-m3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/18\/the-density-of-a-sample-of-crude-oil-is-700-kg-m3\/","title":{"rendered":"The density of a sample of crude oil is 700 kg\/m3"},"content":{"rendered":"\n<p>The density of a sample of crude oil is 700 kg\/m3. Calculate the API gravity. Determine the classification of the crude oil<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>To calculate the <strong>API gravity<\/strong> of a crude oil sample, we use the following formula: API&nbsp;gravity=141.5SG&nbsp;at&nbsp;60\u00b0F\u2212131.5\\text{API gravity} = \\frac{141.5}{\\text{SG at 60\u00b0F}} &#8211; 131.5API&nbsp;gravity=SG&nbsp;at&nbsp;60\u00b0F141.5\u200b\u2212131.5<\/p>\n\n\n\n<p>Where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SG (specific gravity) is the ratio of the density of the crude oil to the density of water at 60\u00b0F (which is approximately 1000 kg\/m\u00b3).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Step 1: Calculate Specific Gravity<\/h3>\n\n\n\n<p>Given:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Density of crude oil = 700 kg\/m\u00b3<\/li>\n\n\n\n<li>Density of water = 1000 kg\/m\u00b3<\/li>\n<\/ul>\n\n\n\n<p>SG=7001000=0.7\\text{SG} = \\frac{700}{1000} = 0.7SG=1000700\u200b=0.7<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Step 2: Calculate API Gravity<\/h3>\n\n\n\n<p>API&nbsp;gravity=141.50.7\u2212131.5=202.14\u2212131.5=70.64\\text{API gravity} = \\frac{141.5}{0.7} &#8211; 131.5 = 202.14 &#8211; 131.5 = 70.64API&nbsp;gravity=0.7141.5\u200b\u2212131.5=202.14\u2212131.5=70.64<\/p>\n\n\n\n<p><strong>API gravity \u2248 70.64\u00b0<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Step 3: Classify the Crude Oil<\/h3>\n\n\n\n<p>Crude oil is classified based on its API gravity as follows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Light crude oil<\/strong>: API gravity > 31.1\u00b0<\/li>\n\n\n\n<li><strong>Medium crude oil<\/strong>: API gravity between 22.3\u00b0 and 31.1\u00b0<\/li>\n\n\n\n<li><strong>Heavy crude oil<\/strong>: API gravity &lt; 22.3\u00b0<\/li>\n\n\n\n<li><strong>Extra heavy crude<\/strong>: API gravity &lt; 10\u00b0<\/li>\n<\/ul>\n\n\n\n<p>Since the calculated API gravity is approximately <strong>70.64\u00b0<\/strong>, this sample is classified as <strong>light crude oil<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p>API gravity is a standard measure used by the petroleum industry to describe how heavy or light a petroleum liquid is compared to water. The scale is set so that most petroleum liquids have values between 10 and 70. If a crude oil has an API gravity greater than 10, it is lighter than water and will float on it. If the API is less than 10, it is heavier and will sink.<\/p>\n\n\n\n<p>In this case, the oil has a density of 700 kg\/m\u00b3, which is much less than that of water. This leads to a high API gravity value, indicating the crude oil is very light. Light crude oils are typically more valuable because they yield a higher percentage of gasoline and diesel during refining.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-708.jpeg\" alt=\"\" class=\"wp-image-238320\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The density of a sample of crude oil is 700 kg\/m3. Calculate the API gravity. Determine the classification of the crude oil The Correct Answer and Explanation is: To calculate the API gravity of a crude oil sample, we use the following formula: API&nbsp;gravity=141.5SG&nbsp;at&nbsp;60\u00b0F\u2212131.5\\text{API gravity} = \\frac{141.5}{\\text{SG at 60\u00b0F}} &#8211; 131.5API&nbsp;gravity=SG&nbsp;at&nbsp;60\u00b0F141.5\u200b\u2212131.5 Where: Step 1: Calculate [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-238318","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238318","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=238318"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238318\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=238318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=238318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=238318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}